.border_div{width: 70%;
    height: 100%;
    margin: auto;
    padding: 20px;
    background-color: aliceblue;
}
.content{
    width: 400px;
    margin: auto;
    padding: 10px;
    display: block;
}
.center{
    text-align: center;
}
.label_right{
    display: inline-block;
    text-align: right;
    width: 100px;
}
input, textarea{
    vertical-align: top;
}
.button{
    margin: 10px;
}